Oscar j



(No Model.)4

O. J. THOMAS..

- AUTOMATIC SEVERING DEVICE POB. PULP MACHINES.

N. Pneus. mummy-wher. whingmn. o. c.

UNITED STATES PATENT OFFICE.

OSOAE J. THOMAS,- OE PENINSULA, OHIO, ASSIGNOH OE ONE-HALE rro JOHN l SEEBEOK, OE SAME PLAOE.

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-AUTOMATIC SEVERING DEVICE FOR PULP-MACHINES.

SPECIFICATION forming part of Letters Patent No. 417,689, dated December 17, 1889.

Application filed May 28, 1889. Serial No.,3l2,374. (No model.)

vices for Pulp-Machines; and I do hereby de-` clare the following to be a.full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same..

My invention relates to improvementsin automatic severing devices for pulp -machines for severing and cleaving the pulp from the receiving-roller; and it consists in certain features of construction and in combination of parts hereinafter described, and

pointed out in the claims.

a side elevation, and Fig. 2 is an end elevation, of a machine embodying my invention. Fig. 3 is a detail of bail gf. Fig. et is a detail of block E and attachments.

A represents the bed of theV machine, having attached upright housings A for supg porting the rollers B B', the former being" journaled in stationary boxes'b, and the latter being journaled in boxes b', adapted to slide up and down the housings with the upand-down movement of roller B. The lower roller B is provided in the usual manner with an endless apron C, by means of which apron the pulp is brought to the rollers, the pulp being taken off the apron by the upper roller B. When the pulp has accumulated to a desired thickness on this upper roller, the pulp is severed lengthwise of the roller and taken off in a thick sheet, and such sheets, wh en afterward folded and dried, constitute the article of commerce from which large varieties of paper are manufactured. Heretofore such severing of the pulp and stripping the same from the roller has usually been by hand, and the thickness of the sheet `of pulp was, in the main, a matter of guess-work on the part of the operator.

For automatically severing the pulp and cleaving the same from the roller when such pulp has reached a predetermined thickness; Iprovide the following mechanism, to wit: A cross -bar D extends above and rests on one of the sliding boxes b of roller B aforesaid, this cross-bar being connected by rods d with cross-bar D ,the latter in turn being connected by link d with lever F near the fulcrum fof the latter. This peculiar construction of con- 5 5 nectingmechanism' is not essential, as any device whereby the said box h is operatively connected with lever -F near the fulcrum of l the latter will answer the purpose.

E is the knife for severing the pulp, the 6o trunnions of this knife being journaled in brackets or hangers af, connected with the housing. On the one trunnion of the knife is secured block E', the same being fastened to the trunnions, preferably by means of setscrews e. This block has at the top a longi- 1 tudinal recess e, in which operates lever G, In the accompanying drawings, Figure l is the latter being pivoted to the block at g,

' and the free end of the leve'r extending over the trunnions of the roller B and in position 7o to engage a cam B2, that is mounted on such trunnion of the upper roller. Vith each revolution of the upper roller cam B2 tilts le- `ver Gr upward, the lever returning to its hori- Zontal or normal position by gravity after the passage of the cam. Just below the bottom of recess e block E is provided with a longitudinal bore, in which operates spindle H, this spindle extending through the block and having attached at the one end thereof 8o sheave H and at the otherend a hook-dog H2, the latter being` adapted to engage bail g. This bail is hinged to and depends from lever Gr, in position to swing toward and'from the dog.

I is the disk, usually cast integral with block E', this disk having a series of holes I on the face thereof, the holes being equidistant from the axis of spindle H.

t and t" are pins adapted to t in the dif- 9o ferent holes I', and are interchangeable with the different holes. Sheave Il has a radiallyprojecting pin or lug h, adapted to engage pins i t", the latter by such engagement serving as stops to limit the rotative movement of 95 the spindle and sheave in either direction, giving more or less movement to the sheave, according to the position of the pins in holes I.

A cord .I is fastened to the free end of le- Ico ver F, and from thence passes under idle sheaves j j', and from thence leads over sheave H', the free end of the cord having attached a poise J' for giving tension to the cord and causing the latter to engage sheave H' with suficient force to rotate the spindle and sheave by the movement of the cord.

In operating the device, suppose pin to be placed in one of holes I', for instance, as shown, and the sheave H to have been adjusted until pin 7L bears against piu i, in which position of parts dog H2 is supposed to be swung back some distance from bail g', knife E meanwhile depending in the inclined position shown, with the edge of the knife separated a short distance from the face of :roller B', so as to clear the pulp on the roller. As the pulp accumulates on roller B' the latter gradually rises, and by means of the connecting mechanism already described such upward movement of the roller tilts upward lever F. This in turn draws on cord J, whereby sheave H' is rotated in the direction to move dog H2 toward its engagement with bail g', lever G meantime operating idly from its engagement with cam B2. When the pulp on the roller has reached a predetermined thickness, the dog engages the bail, thereby locking lever G, so that with the next upward movement of the lever block E' and knife E are actuated in the direction to cause the edge of the knife to engage or come in such close proximity to the face of roller B' as to sever the pulp on the roller and cleave it off, the sheet of pulp thus disengaged falling onto table K. As the pulp is removed from roller B' the latter descends by gravity and rests again upon the apron, thus causing lever F to return to its normal or depressed position, simultaneously with which poise J', by keeping the cord taut, reverses spindle II and disengages dog H' from the bail r whereupon knife E and block E' are returned by gravity to their normal position, with the knife-edge separa-ted from the roller. By adjusting pin i in the different holes I', to cause dog H2 to move a greater or shorter distance from the bail, the thickness of pulp that is allowed to accumulate on the rollerB' is regulated, it being evident that with the dog farther removed from the bail more pulp must accumulate on the roller in elevating the latter the distance necessary to swing the dog forward to engage the bail. Iin t" is adj usted to stop the sheave in the other direction, so that the dog cannot swing under lever G and prevent the latter from reversing.

lVhen the dog is drawn up against the bail, v

the latter swings back out of the way without interfering with the tilting of lever Guntil such times as the dog shall have advanced so far that the bail, with the downward stroke of the lever, can swing by gravity under the shoulder of the dog for locking the dog and block E' together.

lith the construction hereinbefore described, the parts having been adjusted to give the desired thickness to the sheet of pulp, the machine afterward operates automatically and requires no further attention,

and the sheets of pulp discharged from the,

machine are of a uniform thickness.

In a pulp-maehine,the combination, with a feed-roller journaled in movable boxes, and a knife mounted on a shaft and adapted to be forced by the movement of the feed-roller into contact with the pulp on said feed-roller, of mechanism connecting the knife and roller, whereby the former is automatically brought into contact with the latter when the latter has been elevated apredetermiued distance, substantially as set forth.

In testimony whereof I sign this specifica tion, in the presence of two witnesses, this 13th day of March, 1389.

OSCAR J. THOMAS.

Witnesses:

CHAs. Il. Donna, ALBERT E. LYNCH. 4 

